Sökning: "cosmic radiation"

Visar resultat 1 - 5 av 39 avhandlingar innehållade orden cosmic radiation.

  1. 1. The microdosimetric variance-covariance method used for beam quality characterization in radiation protection and radiation therapy

    Detta är en avhandling från Stockholm : Medicinsk strålningsfysik (tills m KI)

    Författare :Jan Erik Lillhök; Stockholms universitet.; [2007]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ionizing radiation; radiation quality; radiation protection; radiation therapy; microdosimetry; nanodosimetry; variance-covariance method; MEDICINE Physiology and pharmacology Radiological research Radiological physics; MEDICIN Fysiologi och farmakologi Radiologisk forskning Radiofysik; medicinsk strålningsfysik; Medical Radiation Physics;

    Sammanfattning : Radiation quality is described by the RBE (relative biological effectiveness) that varies with the ionizing ability of the radiation. Microdosimetric quantities describe distributions of energy imparted to small volumes and can be related to RBE. LÄS MER

  2. 2. Antiprotons in the Cosmic Radiation Measured by the CAPRICE98 Experiment

    Detta är en avhandling från Stockholm : Fysik

    Författare :David Bergström; KTH.; [2001]
    Nyckelord :Antiprotons; Antimatter; Protons; Cosmic Radiation; Magnetic spectrometer; RICH detector;

    Sammanfattning : .... LÄS MER

  3. 3. A New Measurement of Low Energy Antiprotons In the Cosmic Radiation

    Detta är en avhandling från Stockholm : KTH

    Författare :Petter Hofverberg; KTH.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cosmic radiation; antiprotons; solar modulation; NATURAL SCIENCES Physics Elementary particle physics Astroparticle physics; NATURVETENSKAP Fysik Elementarpartikelfysik Astropartikelfysik;

    Sammanfattning : New measurements of the antiproton flux and the antiproton-to-proton flux ratio at the top of the atmosphere between 80 MeV and 2.0 GeV are presented. The measurement was conducted from July 2006 to March 2008 with the PAMELA satellite experiment. LÄS MER

  4. 4. Simulations of Cosmic Reionization Shapes & Sizes of H II regions around Galaxies and Quasars

    Detta är en avhandling från Stockholm : Department of Astronomy, Stockholm University

    Författare :Martina M. Friedrich; Stockholms universitet.; [2012]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; astronomi; Astronomy;

    Sammanfattning : After the era of recombination, roughly 360 000 years after the big bang (redshift 1100), the universe was neutral, continued to expand and eventually the first gravitationally collapsed structures capable of forming stars, formed. Observations show that approximately 1 billion years later (redshift 6), the Universe had become highly ionized. LÄS MER

  5. 5. Some properties of the soft component of cosmic radiation

    Detta är en avhandling från Stockholm : Department of Astronomy, Stockholm University

    Författare :Gösta Ekspong; [1955]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysicumarkivet A:102;

    Sammanfattning : Popular Abstract in English n/a.... LÄS MER